Low temperature X-ray imaging of magnetic flux patterns in high temperature superconductors

Claudia Stahl; Stephen Ruoß; Markus Weigand; Michael Bechtel; Gisela Schütz; Joachim Albrecht

doi:10.1063/1.4907764

Low temperature X-ray imaging of magnetic flux patterns in high temperature superconductors

Claudia Stahl, Stephen Ruoß, Markus Weigand, Michael Bechtel, Gisela Schütz, Joachim Albrecht

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We present X-ray magnetic circular dichroism (XMCD) microscopy results obtained at liquid nitrogen temperatures on the high-T_c superconductor YBCO (YBa₂Cu₃O_7-_δ). The magnetic flux distribution arising from electric currents in the superconductor is detected and visualized using soft-magnetic Co₄₀Fe₄₀B₂₀ (CoFeB) as sensor layer and XMCD as contrast mechanism. It has been shown that the XMCD contrast in the sensor layer directly corresponds to magnetic flux distribution of the superconductor and hence can be used to image magnetic structures in superconductors [Stahl et al., Phys. Rev. B 90, 104515 (2014)]. The existing scanning UHV X-ray microscopy setup MAXYMUS at the synchrotron BESSY II in Berlin has been upgraded for that purpose: we use a nitrogen based MMR Micro Miniature Joule-Thompson Cryostat with temperature range from 75K to 580K. The capability of the method is demonstrated on two different superconducting samples, an optimally doped thin film and a melt-textured block.

Original language	English
Article number	17D109
Journal	Journal of Applied Physics
Volume	117
Issue number	17
DOIs	https://doi.org/10.1063/1.4907764
State	Published - 7 May 2015
Externally published	Yes

Access to Document

10.1063/1.4907764

Cite this

@article{11cf4fa06e2946b0bca6a53ae08ef3c9,

title = "Low temperature X-ray imaging of magnetic flux patterns in high temperature superconductors",

abstract = "We present X-ray magnetic circular dichroism (XMCD) microscopy results obtained at liquid nitrogen temperatures on the high-Tc superconductor YBCO (YBa2Cu3O7-δ). The magnetic flux distribution arising from electric currents in the superconductor is detected and visualized using soft-magnetic Co40Fe40B20 (CoFeB) as sensor layer and XMCD as contrast mechanism. It has been shown that the XMCD contrast in the sensor layer directly corresponds to magnetic flux distribution of the superconductor and hence can be used to image magnetic structures in superconductors [Stahl et al., Phys. Rev. B 90, 104515 (2014)]. The existing scanning UHV X-ray microscopy setup MAXYMUS at the synchrotron BESSY II in Berlin has been upgraded for that purpose: we use a nitrogen based MMR Micro Miniature Joule-Thompson Cryostat with temperature range from 75K to 580K. The capability of the method is demonstrated on two different superconducting samples, an optimally doped thin film and a melt-textured block.",

author = "Claudia Stahl and Stephen Ruo{\ss} and Markus Weigand and Michael Bechtel and Gisela Sch{\"u}tz and Joachim Albrecht",

note = "Publisher Copyright: {\textcopyright} 2015 Author(s).",

year = "2015",

month = may,

day = "7",

doi = "10.1063/1.4907764",

language = "English",

volume = "117",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "17",

}

TY - JOUR

T1 - Low temperature X-ray imaging of magnetic flux patterns in high temperature superconductors

AU - Stahl, Claudia

AU - Ruoß, Stephen

AU - Weigand, Markus

AU - Bechtel, Michael

AU - Schütz, Gisela

AU - Albrecht, Joachim

PY - 2015/5/7

Y1 - 2015/5/7

N2 - We present X-ray magnetic circular dichroism (XMCD) microscopy results obtained at liquid nitrogen temperatures on the high-Tc superconductor YBCO (YBa2Cu3O7-δ). The magnetic flux distribution arising from electric currents in the superconductor is detected and visualized using soft-magnetic Co40Fe40B20 (CoFeB) as sensor layer and XMCD as contrast mechanism. It has been shown that the XMCD contrast in the sensor layer directly corresponds to magnetic flux distribution of the superconductor and hence can be used to image magnetic structures in superconductors [Stahl et al., Phys. Rev. B 90, 104515 (2014)]. The existing scanning UHV X-ray microscopy setup MAXYMUS at the synchrotron BESSY II in Berlin has been upgraded for that purpose: we use a nitrogen based MMR Micro Miniature Joule-Thompson Cryostat with temperature range from 75K to 580K. The capability of the method is demonstrated on two different superconducting samples, an optimally doped thin film and a melt-textured block.

AB - We present X-ray magnetic circular dichroism (XMCD) microscopy results obtained at liquid nitrogen temperatures on the high-Tc superconductor YBCO (YBa2Cu3O7-δ). The magnetic flux distribution arising from electric currents in the superconductor is detected and visualized using soft-magnetic Co40Fe40B20 (CoFeB) as sensor layer and XMCD as contrast mechanism. It has been shown that the XMCD contrast in the sensor layer directly corresponds to magnetic flux distribution of the superconductor and hence can be used to image magnetic structures in superconductors [Stahl et al., Phys. Rev. B 90, 104515 (2014)]. The existing scanning UHV X-ray microscopy setup MAXYMUS at the synchrotron BESSY II in Berlin has been upgraded for that purpose: we use a nitrogen based MMR Micro Miniature Joule-Thompson Cryostat with temperature range from 75K to 580K. The capability of the method is demonstrated on two different superconducting samples, an optimally doped thin film and a melt-textured block.

UR - http://www.scopus.com/inward/record.url?scp=84923684625&partnerID=8YFLogxK

U2 - 10.1063/1.4907764

DO - 10.1063/1.4907764

M3 - Article

AN - SCOPUS:84923684625

SN - 0021-8979

VL - 117

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 17

M1 - 17D109

ER -

Low temperature X-ray imaging of magnetic flux patterns in high temperature superconductors

Abstract

Access to Document

Other files and links

Fingerprint

Cite this